#region show
<template>
  <q-calendar>
    <template #date-cell="{ data }">
      <p :class="data.isSelected ? 'is-selected' : ''">
        {{ data.day.split('-').slice(1).join('-') }}
        {{ data.isSelected ? '😃' : '' }}
      </p>
    </template>
  </q-calendar>
</template>

<style>
.is-selected {
  color: #6bc235;
}
</style>
#endregion show
